Check in the pristine copy of ICU 4.6...

icu46/source/i18n/numfmt.cpp

+/*
+*******************************************************************************
+* Copyright (C) 1997-2010, International Business Machines Corporation and    *
+* others. All Rights Reserved.                                                *
+*******************************************************************************
+*
+* File NUMFMT.CPP
+*
+* Modification History:
+*
+*   Date        Name        Description
+*   02/19/97    aliu        Converted from java.
+*   03/18/97    clhuang     Implemented with C++ APIs.
+*   04/17/97    aliu        Enlarged MAX_INTEGER_DIGITS to fully accomodate the
+*                           largest double, by default.
+*                           Changed DigitCount to int per code review.
+*    07/20/98    stephen        Changed operator== to check for grouping
+*                            Changed setMaxIntegerDigits per Java implementation.
+*                            Changed setMinIntegerDigits per Java implementation.
+*                            Changed setMinFractionDigits per Java implementation.
+*                            Changed setMaxFractionDigits per Java implementation.
+********************************************************************************
+*/
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+#include "unicode/numfmt.h"
+#include "unicode/locid.h"
+#include "unicode/dcfmtsym.h"
+#include "unicode/decimfmt.h"
+#include "unicode/ustring.h"
+#include "unicode/ucurr.h"
+#include "unicode/curramt.h"
+#include "unicode/numsys.h"
+#include "unicode/rbnf.h"
+#include "winnmfmt.h"
+#include "uresimp.h"
+#include "uhash.h"
+#include "cmemory.h"
+#include "servloc.h"
+#include "ucln_in.h"
+#include "cstring.h"
+#include "putilimp.h"
+#include "umutex.h"
+#include "digitlst.h"
+#include <float.h>
+
+//#define FMT_DEBUG
+
+#ifdef FMT_DEBUG
+#include <stdio.h>
+static void debugout(UnicodeString s) {
+    char buf[2000];
+    s.extract((int32_t) 0, s.length(), buf);
+    printf("%s", buf);
+}
+#define debug(x) printf("%s", x);
+#else
+#define debugout(x)
+#define debug(x)
+#endif
+
+// If no number pattern can be located for a locale, this is the last
+// resort.
+static const UChar gLastResortDecimalPat[] = {
+    0x23, 0x30, 0x2E, 0x23, 0x23, 0x23, 0x3B, 0x2D, 0x23, 0x30, 0x2E, 0x23, 0x23, 0x23, 0 /* "#0.###;-#0.###" */
+};
+static const UChar gLastResortCurrencyPat[] = {
+    0x24, 0x23, 0x30, 0x2E, 0x30, 0x30, 0x3B, 0x28, 0x24, 0x23, 0x30, 0x2E, 0x30, 0x30, 0x29, 0 /* "$#0.00;($#0.00)" */
+};
+static const UChar gLastResortPercentPat[] = {
+    0x23, 0x30, 0x25, 0 /* "#0%" */
+};
+static const UChar gLastResortScientificPat[] = {
+    0x23, 0x45, 0x30, 0 /* "#E0" */
+};
+static const UChar gLastResortIsoCurrencyPat[] = {
+    0xA4, 0xA4, 0x23, 0x30, 0x2E, 0x30, 0x30, 0x3B, 0x28, 0xA4, 0xA4, 0x23, 0x30, 0x2E, 0x30, 0x30, 0x29, 0 /* "\u00A4\u00A4#0.00;(\u00A4\u00A4#0.00)" */
+};
+static const UChar gLastResortPluralCurrencyPat[] = {
+    0x23, 0x30, 0x2E, 0x30, 0x30, 0xA0, 0xA4, 0xA4, 0xA4, 0 /* "#0.00\u00A0\u00A4\u00A4\u00A4*/
+};
+
+static const UChar gSingleCurrencySign[] = {0xA4, 0};
+static const UChar gDoubleCurrencySign[] = {0xA4, 0xA4, 0};
+
+static const UChar gSlash = 0x2f;
+
+// If the maximum base 10 exponent were 4, then the largest number would
+// be 99,999 which has 5 digits.
+// On IEEE754 systems gMaxIntegerDigits is 308 + possible denormalized 15 digits + rounding digit
+static const int32_t gMaxIntegerDigits = DBL_MAX_10_EXP + DBL_DIG + 1;
+static const int32_t gMinIntegerDigits = 127;
+
+static const UChar * const gLastResortNumberPatterns[] =
+{
+    gLastResortDecimalPat,
+    gLastResortCurrencyPat,
+    gLastResortPercentPat,
+    gLastResortScientificPat,
+    gLastResortIsoCurrencyPat,
+    gLastResortPluralCurrencyPat,
+};
+
+// Keys used for accessing resource bundles
+
+static const char *gNumberElements = "NumberElements";
+static const char *gLatn = "latn";
+static const char *gPatterns = "patterns";
+static const char *gFormatKeys[] = { "decimalFormat", "currencyFormat", "percentFormat", "scientificFormat" };
+
+// Static hashtable cache of NumberingSystem objects used by NumberFormat
+static UHashtable * NumberingSystem_cache = NULL;
+
+static UMTX nscacheMutex = NULL;
+
+#if !UCONFIG_NO_SERVICE
+static U_NAMESPACE_QUALIFIER ICULocaleService* gService = NULL;
+#endif
+
+/**
+ * Release all static memory held by Number Format.
+ */
+U_CDECL_BEGIN
+static void U_CALLCONV
+deleteNumberingSystem(void *obj) {
+    delete (U_NAMESPACE_QUALIFIER NumberingSystem *)obj;
+}
+
+static UBool U_CALLCONV numfmt_cleanup(void) {
+#if !UCONFIG_NO_SERVICE
+    if (gService) {
+        delete gService;
+        gService = NULL;
+    }
+#endif
+    if (NumberingSystem_cache) {
+        // delete NumberingSystem_cache;
+        uhash_close(NumberingSystem_cache);
+        NumberingSystem_cache = NULL;
+    }
+
+    return TRUE;
+}
+U_CDECL_END
+
+// *****************************************************************************
+// class NumberFormat
+// *****************************************************************************
+
+U_NAMESPACE_BEGIN
+
+UOBJECT_DEFINE_ABSTRACT_RTTI_IMPLEMENTATION(NumberFormat)
+
+#if !UCONFIG_NO_SERVICE
+// -------------------------------------
+// SimpleNumberFormatFactory implementation
+NumberFormatFactory::~NumberFormatFactory() {}
+SimpleNumberFormatFactory::SimpleNumberFormatFactory(const Locale& locale, UBool visible)
+    : _visible(visible)
+{
+    LocaleUtility::initNameFromLocale(locale, _id);
+}
+
+SimpleNumberFormatFactory::~SimpleNumberFormatFactory() {}
+
+UBool SimpleNumberFormatFactory::visible(void) const {
+    return _visible;
+}
+
+const UnicodeString *
+SimpleNumberFormatFactory::getSupportedIDs(int32_t &count, UErrorCode& status) const
+{
+    if (U_SUCCESS(status)) {
+        count = 1;
+        return &_id;
+    }
+    count = 0;
+    return NULL;
+}
+#endif /* #if !UCONFIG_NO_SERVICE */
+
+// -------------------------------------
+// default constructor
+NumberFormat::NumberFormat()
+:   fGroupingUsed(TRUE),
+    fMaxIntegerDigits(gMaxIntegerDigits),
+    fMinIntegerDigits(1),
+    fMaxFractionDigits(3), // invariant, >= minFractionDigits
+    fMinFractionDigits(0),
+    fParseIntegerOnly(FALSE)
+{
+    fCurrency[0] = 0;
+}
+
+// -------------------------------------
+
+NumberFormat::~NumberFormat()
+{
+}
+
+// -------------------------------------
+// copy constructor
+
+NumberFormat::NumberFormat(const NumberFormat &source)
+:   Format(source)
+{
+    *this = source;
+}
+
+// -------------------------------------
+// assignment operator
+
+NumberFormat&
+NumberFormat::operator=(const NumberFormat& rhs)
+{
+    if (this != &rhs)
+    {
+        Format::operator=(rhs);
+        fGroupingUsed = rhs.fGroupingUsed;
+        fMaxIntegerDigits = rhs.fMaxIntegerDigits;
+        fMinIntegerDigits = rhs.fMinIntegerDigits;
+        fMaxFractionDigits = rhs.fMaxFractionDigits;
+        fMinFractionDigits = rhs.fMinFractionDigits;
+        fParseIntegerOnly = rhs.fParseIntegerOnly;
+        u_strncpy(fCurrency, rhs.fCurrency, 4);
+    }
+    return *this;
+}
+
+// -------------------------------------
+
+UBool
+NumberFormat::operator==(const Format& that) const
+{
+    // Format::operator== guarantees this cast is safe
+    NumberFormat* other = (NumberFormat*)&that;
+
+#ifdef FMT_DEBUG
+    // This code makes it easy to determine why two format objects that should
+    // be equal aren't.
+    UBool first = TRUE;
+    if (!Format::operator==(that)) {
+        if (first) { printf("[ "); first = FALSE; } else { printf(", "); }
+        debug("Format::!=");
+    }
+    if (!(fMaxIntegerDigits == other->fMaxIntegerDigits &&
+          fMinIntegerDigits == other->fMinIntegerDigits)) {
+        if (first) { printf("[ "); first = FALSE; } else { printf(", "); }
+        debug("Integer digits !=");
+    }
+    if (!(fMaxFractionDigits == other->fMaxFractionDigits &&
+          fMinFractionDigits == other->fMinFractionDigits)) {
+        if (first) { printf("[ "); first = FALSE; } else { printf(", "); }
+        debug("Fraction digits !=");
+    }
+    if (!(fGroupingUsed == other->fGroupingUsed)) {
+        if (first) { printf("[ "); first = FALSE; } else { printf(", "); }
+        debug("fGroupingUsed != ");
+    }
+    if (!(fParseIntegerOnly == other->fParseIntegerOnly)) {
+        if (first) { printf("[ "); first = FALSE; } else { printf(", "); }
+        debug("fParseIntegerOnly != ");
+    }
+    if (!(u_strcmp(fCurrency, other->fCurrency) == 0)) {
+        if (first) { printf("[ "); first = FALSE; } else { printf(", "); }
+        debug("fCurrency !=");
+    }
+    if (!first) { printf(" ]"); }
+#endif
+
+    return ((this == &that) ||
+            ((Format::operator==(that) &&
+              fMaxIntegerDigits == other->fMaxIntegerDigits &&
+              fMinIntegerDigits == other->fMinIntegerDigits &&
+              fMaxFractionDigits == other->fMaxFractionDigits &&
+              fMinFractionDigits == other->fMinFractionDigits &&
+              fGroupingUsed == other->fGroupingUsed &&
+              fParseIntegerOnly == other->fParseIntegerOnly &&
+              u_strcmp(fCurrency, other->fCurrency) == 0)));
+}
+
+// -------------------------------------
+// Default implementation sets unsupported error; subclasses should
+// override.
+
+UnicodeString&
+NumberFormat::format(double /* unused number */,
+                     UnicodeString& toAppendTo,
+                     FieldPositionIterator* /* unused posIter */,
+                     UErrorCode& status) const
+{
+    if (!U_FAILURE(status)) {
+        status = U_UNSUPPORTED_ERROR;
+    }
+    return toAppendTo;
+}
+
+// -------------------------------------
+// Default implementation sets unsupported error; subclasses should
+// override.
+
+UnicodeString&
+NumberFormat::format(int32_t /* unused number */,
+                     UnicodeString& toAppendTo,
+                     FieldPositionIterator* /* unused posIter */,
+                     UErrorCode& status) const
+{
+    if (!U_FAILURE(status)) {
+        status = U_UNSUPPORTED_ERROR;
+    }
+    return toAppendTo;
+}
+
+// -------------------------------------
+// Default implementation sets unsupported error; subclasses should
+// override.
+
+UnicodeString&
+NumberFormat::format(int64_t /* unused number */,
+                     UnicodeString& toAppendTo,
+                     FieldPositionIterator* /* unused posIter */,
+                     UErrorCode& status) const
+{
+    if (!U_FAILURE(status)) {
+        status = U_UNSUPPORTED_ERROR;
+    }
+    return toAppendTo;
+}
+
+// -------------------------------------
+// Decimal Number format() default implementation 
+// Subclasses do not normally override this function, but rather the DigitList
+// formatting functions..
+//   The expected call chain from here is
+//      this function ->
+//      NumberFormat::format(Formattable  ->
+//      DecimalFormat::format(DigitList    
+//
+//   Or, for subclasses of Formattable that do not know about DigitList,
+//       this Function ->
+//       NumberFormat::format(Formattable  ->
+//       NumberFormat::format(DigitList  ->
+//       XXXFormat::format(double
+
+UnicodeString&
+NumberFormat::format(const StringPiece &decimalNum,
+                     UnicodeString& toAppendTo,
+                     FieldPositionIterator* fpi,
+                     UErrorCode& status) const
+{
+    Formattable f;
+    f.setDecimalNumber(decimalNum, status);
+    format(f, toAppendTo, fpi, status);
+    return toAppendTo;
+}
+
+// -------------------------------------
+// Formats the number object and save the format
+// result in the toAppendTo string buffer.
+
+// utility to save/restore state, used in two overloads
+// of format(const Formattable&...) below.
+
+class ArgExtractor {
+  NumberFormat *ncnf;
+  const Formattable* num;
+  UBool setCurr;
+  UChar save[4];
+
+ public:
+  ArgExtractor(const NumberFormat& nf, const Formattable& obj, UErrorCode& status);
+  ~ArgExtractor();
+
+  const Formattable* number(void) const;
+};
+
+inline const Formattable*
+ArgExtractor::number(void) const {
+  return num;
+}
+
+ArgExtractor::ArgExtractor(const NumberFormat& nf, const Formattable& obj, UErrorCode& status)
+    : ncnf((NumberFormat*) &nf), num(&obj), setCurr(FALSE) {
+
+    const UObject* o = obj.getObject(); // most commonly o==NULL
+    const CurrencyAmount* amt;
+    if (o != NULL && (amt = dynamic_cast<const CurrencyAmount*>(o)) != NULL) {
+        // getISOCurrency() returns a pointer to internal storage, so we
+        // copy it to retain it across the call to setCurrency().
+        const UChar* curr = amt->getISOCurrency();
+        u_strcpy(save, nf.getCurrency());
+        setCurr = (u_strcmp(curr, save) != 0);
+        if (setCurr) {
+            ncnf->setCurrency(curr, status);
+        }
+        num = &amt->getNumber();
+    }
+}
+
+ArgExtractor::~ArgExtractor() {
+    if (setCurr) {
+        UErrorCode ok = U_ZERO_ERROR;
+        ncnf->setCurrency(save, ok); // always restore currency
+    }
+}
+
+UnicodeString& NumberFormat::format(const DigitList &number,
+                      UnicodeString& appendTo,
+                      FieldPositionIterator* posIter,
+                      UErrorCode& status) const {
+    // DecimalFormat overrides this function, and handles DigitList based big decimals.
+    // Other subclasses (ChoiceFormat, RuleBasedNumberFormat) do not (yet) handle DigitLists,
+    // so this default implementation falls back to formatting decimal numbers as doubles.
+    if (U_FAILURE(status)) {
+        return appendTo;
+    }
+    double dnum = number.getDouble();
+    format(dnum, appendTo, posIter, status);
+    return appendTo;
+}
+
+
+
+UnicodeString&
+NumberFormat::format(const DigitList &number,
+                     UnicodeString& appendTo,
+                     FieldPosition& pos,
+                     UErrorCode &status) const { 
+    // DecimalFormat overrides this function, and handles DigitList based big decimals.
+    // Other subclasses (ChoiceFormat, RuleBasedNumberFormat) do not (yet) handle DigitLists,
+    // so this default implementation falls back to formatting decimal numbers as doubles.
+    if (U_FAILURE(status)) {
+        return appendTo;
+    }
+    double dnum = number.getDouble();
+    format(dnum, appendTo, pos, status);
+    return appendTo;
+}
+
+UnicodeString&
+NumberFormat::format(const Formattable& obj,
+                        UnicodeString& appendTo,
+                        FieldPosition& pos,
+                        UErrorCode& status) const
+{
+    if (U_FAILURE(status)) return appendTo;
+
+    ArgExtractor arg(*this, obj, status);
+    const Formattable *n = arg.number();
+
+    if (n->isNumeric() && n->getDigitList() != NULL) {
+        // Decimal Number.  We will have a DigitList available if the value was
+        //   set to a decimal number, or if the value originated with a parse.
+        //
+        // The default implementation for formatting a DigitList converts it
+        // to a double, and formats that, allowing formatting classes that don't
+        // know about DigitList to continue to operate as they had.
+        //
+        // DecimalFormat overrides the DigitList formatting functions.
+        format(*n->getDigitList(), appendTo, pos, status);
+    } else {
+        switch (n->getType()) {
+        case Formattable::kDouble:
+            format(n->getDouble(), appendTo, pos);
+            break;
+        case Formattable::kLong:
+            format(n->getLong(), appendTo, pos);
+            break;
+        case Formattable::kInt64:
+            format(n->getInt64(), appendTo, pos);
+            break;
+        default:
+            status = U_INVALID_FORMAT_ERROR;
+            break;
+        }
+    }
+
+    return appendTo;
+}
+
+// -------------------------------------x
+// Formats the number object and save the format
+// result in the toAppendTo string buffer.
+
+UnicodeString&
+NumberFormat::format(const Formattable& obj,
+                        UnicodeString& appendTo,
+                        FieldPositionIterator* posIter,
+                        UErrorCode& status) const
+{
+    if (U_FAILURE(status)) return appendTo;
+
+    ArgExtractor arg(*this, obj, status);
+    const Formattable *n = arg.number();
+
+    if (n->isNumeric() && n->getDigitList() != NULL) {
+        // Decimal Number
+        format(*n->getDigitList(), appendTo, posIter, status);
+    } else {
+        switch (n->getType()) {
+        case Formattable::kDouble:
+            format(n->getDouble(), appendTo, posIter, status);
+            break;
+        case Formattable::kLong:
+            format(n->getLong(), appendTo, posIter, status);
+            break;
+        case Formattable::kInt64:
+            format(n->getInt64(), appendTo, posIter, status);
+            break;
+        default:
+            status = U_INVALID_FORMAT_ERROR;
+            break;
+        }
+    }
+
+    return appendTo;
+}
+
+// -------------------------------------
+
+UnicodeString&
+NumberFormat::format(int64_t number,
+                     UnicodeString& appendTo,
+                     FieldPosition& pos) const
+{
+    // default so we don't introduce a new abstract method
+    return format((int32_t)number, appendTo, pos);
+}
+
+// -------------------------------------
+// Parses the string and save the result object as well
+// as the final parsed position.
+
+void
+NumberFormat::parseObject(const UnicodeString& source,
+                             Formattable& result,
+                             ParsePosition& parse_pos) const
+{
+    parse(source, result, parse_pos);
+}
+
+// -------------------------------------
+// Formats a double number and save the result in a string.
+
+UnicodeString&
+NumberFormat::format(double number, UnicodeString& appendTo) const
+{
+    FieldPosition pos(0);
+    return format(number, appendTo, pos);
+}
+
+// -------------------------------------
+// Formats a long number and save the result in a string.
+
+UnicodeString&
+NumberFormat::format(int32_t number, UnicodeString& appendTo) const
+{
+    FieldPosition pos(0);
+    return format(number, appendTo, pos);
+}
+
+// -------------------------------------
+// Formats a long number and save the result in a string.
+
+UnicodeString&
+NumberFormat::format(int64_t number, UnicodeString& appendTo) const
+{
+    FieldPosition pos(0);
+    return format(number, appendTo, pos);
+}
+
+// -------------------------------------
+// Parses the text and save the result object.  If the returned
+// parse position is 0, that means the parsing failed, the status
+// code needs to be set to failure.  Ignores the returned parse
+// position, otherwise.
+
+void
+NumberFormat::parse(const UnicodeString& text,
+                        Formattable& result,
+                        UErrorCode& status) const
+{
+    if (U_FAILURE(status)) return;
+
+    ParsePosition parsePosition(0);
+    parse(text, result, parsePosition);
+    if (parsePosition.getIndex() == 0) {
+        status = U_INVALID_FORMAT_ERROR;
+    }
+}
+
+Formattable& NumberFormat::parseCurrency(const UnicodeString& text,
+                                         Formattable& result,
+                                         ParsePosition& pos) const {
+    // Default implementation only -- subclasses should override
+    int32_t start = pos.getIndex();
+    parse(text, result, pos);
+    if (pos.getIndex() != start) {
+        UChar curr[4];
+        UErrorCode ec = U_ZERO_ERROR;
+        getEffectiveCurrency(curr, ec);
+        if (U_SUCCESS(ec)) {
+            Formattable n(result);
+            CurrencyAmount *tempCurAmnt = new CurrencyAmount(n, curr, ec);  // Use for null testing.
+            if (U_FAILURE(ec) || tempCurAmnt == NULL) {
+                pos.setIndex(start); // indicate failure
+            } else {
+                result.adoptObject(tempCurAmnt);
+            }
+        }
+    }
+    return result;
+}
+
+// -------------------------------------
+// Sets to only parse integers.
+
+void
+NumberFormat::setParseIntegerOnly(UBool value)
+{
+    fParseIntegerOnly = value;
+}
+
+// -------------------------------------
+// Create a number style NumberFormat instance with the default locale.
+
+NumberFormat* U_EXPORT2
+NumberFormat::createInstance(UErrorCode& status)
+{
+    return createInstance(Locale::getDefault(), kNumberStyle, status);
+}
+
+// -------------------------------------
+// Create a number style NumberFormat instance with the inLocale locale.
+
+NumberFormat* U_EXPORT2
+NumberFormat::createInstance(const Locale& inLocale, UErrorCode& status)
+{
+    return createInstance(inLocale, kNumberStyle, status);
+}
+
+// -------------------------------------
+// Create a currency style NumberFormat instance with the default locale.
+
+NumberFormat* U_EXPORT2
+NumberFormat::createCurrencyInstance(UErrorCode& status)
+{
+    return createCurrencyInstance(Locale::getDefault(),  status);
+}
+
+// -------------------------------------
+// Create a currency style NumberFormat instance with the inLocale locale.
+
+NumberFormat* U_EXPORT2
+NumberFormat::createCurrencyInstance(const Locale& inLocale, UErrorCode& status)
+{
+    return createInstance(inLocale, kCurrencyStyle, status);
+}
+
+// -------------------------------------
+// Create a percent style NumberFormat instance with the default locale.
+
+NumberFormat* U_EXPORT2
+NumberFormat::createPercentInstance(UErrorCode& status)
+{
+    return createInstance(Locale::getDefault(), kPercentStyle, status);
+}
+
+// -------------------------------------
+// Create a percent style NumberFormat instance with the inLocale locale.
+
+NumberFormat* U_EXPORT2
+NumberFormat::createPercentInstance(const Locale& inLocale, UErrorCode& status)
+{
+    return createInstance(inLocale, kPercentStyle, status);
+}
+
+// -------------------------------------
+// Create a scientific style NumberFormat instance with the default locale.
+
+NumberFormat* U_EXPORT2
+NumberFormat::createScientificInstance(UErrorCode& status)
+{
+    return createInstance(Locale::getDefault(), kScientificStyle, status);
+}
+
+// -------------------------------------
+// Create a scientific style NumberFormat instance with the inLocale locale.
+
+NumberFormat* U_EXPORT2
+NumberFormat::createScientificInstance(const Locale& inLocale, UErrorCode& status)
+{
+    return createInstance(inLocale, kScientificStyle, status);
+}
+
+// -------------------------------------
+
+const Locale* U_EXPORT2
+NumberFormat::getAvailableLocales(int32_t& count)
+{
+    return Locale::getAvailableLocales(count);
+}
+
+// ------------------------------------------
+//
+// Registration
+//
+//-------------------------------------------
+
+#if !UCONFIG_NO_SERVICE
+
+// -------------------------------------
+
+class ICUNumberFormatFactory : public ICUResourceBundleFactory {
+protected:
+    virtual UObject* handleCreate(const Locale& loc, int32_t kind, const ICUService* /* service */, UErrorCode& status) const {
+        // !!! kind is not an EStyles, need to determine how to handle this
+        return NumberFormat::makeInstance(loc, (NumberFormat::EStyles)kind, status);
+    }
+};
+
+// -------------------------------------
+
+class NFFactory : public LocaleKeyFactory {
+private:
+    NumberFormatFactory* _delegate;
+    Hashtable* _ids;
+
+public:
+    NFFactory(NumberFormatFactory* delegate)
+        : LocaleKeyFactory(delegate->visible() ? VISIBLE : INVISIBLE)
+        , _delegate(delegate)
+        , _ids(NULL)
+    {
+    }
+
+    virtual ~NFFactory()
+    {
+        delete _delegate;
+        delete _ids;
+    }
+
+    virtual UObject* create(const ICUServiceKey& key, const ICUService* service, UErrorCode& status) const
+    {
+        if (handlesKey(key, status)) {
+            const LocaleKey& lkey = (const LocaleKey&)key;
+            Locale loc;
+            lkey.canonicalLocale(loc);
+            int32_t kind = lkey.kind();
+
+            UObject* result = _delegate->createFormat(loc, (UNumberFormatStyle)(kind+1));
+            if (result == NULL) {
+                result = service->getKey((ICUServiceKey&)key /* cast away const */, NULL, this, status);
+            }
+            return result;
+        }
+        return NULL;
+    }
+
+protected:
+    /**
+     * Return the set of ids that this factory supports (visible or
+     * otherwise).  This can be called often and might need to be
+     * cached if it is expensive to create.
+     */
+    virtual const Hashtable* getSupportedIDs(UErrorCode& status) const
+    {
+        if (U_SUCCESS(status)) {
+            if (!_ids) {
+                int32_t count = 0;
+                const UnicodeString * const idlist = _delegate->getSupportedIDs(count, status);
+                ((NFFactory*)this)->_ids = new Hashtable(status); /* cast away const */
+                if (_ids) {
+                    for (int i = 0; i < count; ++i) {
+                        _ids->put(idlist[i], (void*)this, status);
+                    }
+                }
+            }
+            return _ids;
+        }
+        return NULL;
+    }
+};
+
+class ICUNumberFormatService : public ICULocaleService {
+public:
+    ICUNumberFormatService()
+        : ICULocaleService(UNICODE_STRING_SIMPLE("Number Format"))
+    {
+        UErrorCode status = U_ZERO_ERROR;
+        registerFactory(new ICUNumberFormatFactory(), status);
+    }
+
+    virtual UObject* cloneInstance(UObject* instance) const {
+        return ((NumberFormat*)instance)->clone();
+    }
+
+    virtual UObject* handleDefault(const ICUServiceKey& key, UnicodeString* /* actualID */, UErrorCode& status) const {
+        LocaleKey& lkey = (LocaleKey&)key;
+        int32_t kind = lkey.kind();
+        Locale loc;
+        lkey.currentLocale(loc);
+        return NumberFormat::makeInstance(loc, (NumberFormat::EStyles)kind, status);
+    }
+
+    virtual UBool isDefault() const {
+        return countFactories() == 1;
+    }
+};
+
+// -------------------------------------
+
+static ICULocaleService*
+getNumberFormatService(void)
+{
+    UBool needInit;
+    UMTX_CHECK(NULL, (UBool)(gService == NULL), needInit);
+    if (needInit) {
+        ICULocaleService * newservice = new ICUNumberFormatService();
+        if (newservice) {
+            umtx_lock(NULL);
+            if (gService == NULL) {
+                gService = newservice;
+                newservice = NULL;
+            }
+            umtx_unlock(NULL);
+        }
+        if (newservice) {
+            delete newservice;
+        } else {
+            // we won the contention, this thread can register cleanup.
+            ucln_i18n_registerCleanup(UCLN_I18N_NUMFMT, numfmt_cleanup);
+        }
+    }
+    return gService;
+}
+
+// -------------------------------------
+
+URegistryKey U_EXPORT2
+NumberFormat::registerFactory(NumberFormatFactory* toAdopt, UErrorCode& status)
+{
+  ICULocaleService *service = getNumberFormatService();
+  if (service) {
+          NFFactory *tempnnf = new NFFactory(toAdopt);
+          if (tempnnf != NULL) {
+                  return service->registerFactory(tempnnf, status);
+          }
+  }
+  status = U_MEMORY_ALLOCATION_ERROR;
+  return NULL;
+}
+
+// -------------------------------------
+
+UBool U_EXPORT2
+NumberFormat::unregister(URegistryKey key, UErrorCode& status)
+{
+    if (U_SUCCESS(status)) {
+        UBool haveService;
+        UMTX_CHECK(NULL, gService != NULL, haveService);
+        if (haveService) {
+            return gService->unregister(key, status);
+        }
+        status = U_ILLEGAL_ARGUMENT_ERROR;
+    }
+    return FALSE;
+}
+
+// -------------------------------------
+StringEnumeration* U_EXPORT2
+NumberFormat::getAvailableLocales(void)
+{
+  ICULocaleService *service = getNumberFormatService();
+  if (service) {
+    return service->getAvailableLocales();
+  }
+  return NULL; // no way to return error condition
+}
+#endif /* UCONFIG_NO_SERVICE */
+// -------------------------------------
+
+NumberFormat* U_EXPORT2
+NumberFormat::createInstance(const Locale& loc, EStyles kind, UErrorCode& status)
+{
+#if !UCONFIG_NO_SERVICE
+    UBool haveService;
+    UMTX_CHECK(NULL, gService != NULL, haveService);
+    if (haveService) {
+        return (NumberFormat*)gService->get(loc, kind, status);
+    }
+    else
+#endif
+    {
+        return makeInstance(loc, kind, status);
+    }
+}
+
+
+// -------------------------------------
+// Checks if the thousand/10 thousand grouping is used in the
+// NumberFormat instance.
+
+UBool
+NumberFormat::isGroupingUsed() const
+{
+    return fGroupingUsed;
+}
+
+// -------------------------------------
+// Sets to use the thousand/10 thousand grouping in the
+// NumberFormat instance.
+
+void
+NumberFormat::setGroupingUsed(UBool newValue)
+{
+    fGroupingUsed = newValue;
+}
+
+// -------------------------------------
+// Gets the maximum number of digits for the integral part for
+// this NumberFormat instance.
+
+int32_t NumberFormat::getMaximumIntegerDigits() const
+{
+    return fMaxIntegerDigits;
+}
+
+// -------------------------------------
+// Sets the maximum number of digits for the integral part for
+// this NumberFormat instance.
+
+void
+NumberFormat::setMaximumIntegerDigits(int32_t newValue)
+{
+    fMaxIntegerDigits = uprv_max(0, uprv_min(newValue, gMaxIntegerDigits));
+    if(fMinIntegerDigits > fMaxIntegerDigits)
+        fMinIntegerDigits = fMaxIntegerDigits;
+}
+
+// -------------------------------------
+// Gets the minimum number of digits for the integral part for
+// this NumberFormat instance.
+
+int32_t
+NumberFormat::getMinimumIntegerDigits() const
+{
+    return fMinIntegerDigits;
+}
+
+// -------------------------------------
+// Sets the minimum number of digits for the integral part for
+// this NumberFormat instance.
+
+void
+NumberFormat::setMinimumIntegerDigits(int32_t newValue)
+{
+    fMinIntegerDigits = uprv_max(0, uprv_min(newValue, gMinIntegerDigits));
+    if(fMinIntegerDigits > fMaxIntegerDigits)
+        fMaxIntegerDigits = fMinIntegerDigits;
+}
+
+// -------------------------------------
+// Gets the maximum number of digits for the fractional part for
+// this NumberFormat instance.
+
+int32_t
+NumberFormat::getMaximumFractionDigits() const
+{
+    return fMaxFractionDigits;
+}
+
+// -------------------------------------
+// Sets the maximum number of digits for the fractional part for
+// this NumberFormat instance.
+
+void
+NumberFormat::setMaximumFractionDigits(int32_t newValue)
+{
+    fMaxFractionDigits = uprv_max(0, uprv_min(newValue, gMaxIntegerDigits));
+    if(fMaxFractionDigits < fMinFractionDigits)
+        fMinFractionDigits = fMaxFractionDigits;
+}
+
+// -------------------------------------
+// Gets the minimum number of digits for the fractional part for
+// this NumberFormat instance.
+
+int32_t
+NumberFormat::getMinimumFractionDigits() const
+{
+    return fMinFractionDigits;
+}
+
+// -------------------------------------
+// Sets the minimum number of digits for the fractional part for
+// this NumberFormat instance.
+
+void
+NumberFormat::setMinimumFractionDigits(int32_t newValue)
+{
+    fMinFractionDigits = uprv_max(0, uprv_min(newValue, gMinIntegerDigits));
+    if (fMaxFractionDigits < fMinFractionDigits)
+        fMaxFractionDigits = fMinFractionDigits;
+}
+
+// -------------------------------------
+
+void NumberFormat::setCurrency(const UChar* theCurrency, UErrorCode& ec) {
+    if (U_FAILURE(ec)) {
+        return;
+    }
+    if (theCurrency) {
+        u_strncpy(fCurrency, theCurrency, 3);
+        fCurrency[3] = 0;
+    } else {
+        fCurrency[0] = 0;
+    }
+}
+
+const UChar* NumberFormat::getCurrency() const {
+    return fCurrency;
+}
+
+void NumberFormat::getEffectiveCurrency(UChar* result, UErrorCode& ec) const {
+    const UChar* c = getCurrency();
+    if (*c != 0) {
+        u_strncpy(result, c, 3);
+        result[3] = 0;
+    } else {
+        const char* loc = getLocaleID(ULOC_VALID_LOCALE, ec);
+        if (loc == NULL) {
+            loc = uloc_getDefault();
+        }
+        ucurr_forLocale(loc, result, 4, &ec);
+    }
+}
+
+// -------------------------------------
+// Creates the NumberFormat instance of the specified style (number, currency,
+// or percent) for the desired locale.
+
+NumberFormat*
+NumberFormat::makeInstance(const Locale& desiredLocale,
+                           EStyles style,
+                           UErrorCode& status)
+{
+    if (U_FAILURE(status)) return NULL;
+
+    if (style < 0 || style >= kStyleCount) {
+        status = U_ILLEGAL_ARGUMENT_ERROR;
+        return NULL;
+    }
+
+#ifdef U_WINDOWS
+    char buffer[8];
+    int32_t count = desiredLocale.getKeywordValue("compat", buffer, sizeof(buffer), status);
+
+    // if the locale has "@compat=host", create a host-specific NumberFormat
+    if (count > 0 && uprv_strcmp(buffer, "host") == 0) {
+        Win32NumberFormat *f = NULL;
+        UBool curr = TRUE;
+
+        switch (style) {
+        case kNumberStyle:
+            curr = FALSE;
+            // fall-through
+
+        case kCurrencyStyle:
+        case kIsoCurrencyStyle: // do not support plural formatting here
+        case kPluralCurrencyStyle:
+            f = new Win32NumberFormat(desiredLocale, curr, status);
+
+            if (U_SUCCESS(status)) {
+                return f;
+            }
+
+            delete f;
+            break;
+
+        default:
+            break;
+        }
+    }
+#endif
+
+    NumberFormat* f = NULL;
+    DecimalFormatSymbols* symbolsToAdopt = NULL;
+    UnicodeString pattern;
+    UResourceBundle *resource = ures_open(NULL, desiredLocale.getName(), &status);
+    NumberingSystem *ns = NULL;
+    UBool deleteSymbols = TRUE;
+    UHashtable * cache = NULL;
+    int32_t hashKey;
+    UBool getCache = FALSE;
+    UBool deleteNS = FALSE;
+
+    if (U_FAILURE(status)) {
+        // We don't appear to have resource data available -- use the last-resort data
+        status = U_USING_FALLBACK_WARNING;
+        // When the data is unavailable, and locale isn't passed in, last resort data is used.
+        symbolsToAdopt = new DecimalFormatSymbols(status);
+
+        // Creates a DecimalFormat instance with the last resort number patterns.
+        pattern.setTo(TRUE, gLastResortNumberPatterns[style], -1);
+    }
+    else {
+        // Loads the decimal symbols of the desired locale.
+        symbolsToAdopt = new DecimalFormatSymbols(desiredLocale, status);
+
+        int32_t patLen = 0;
+
+        /* for ISOCURRENCYSTYLE and PLURALCURRENCYSTYLE,
+         * the pattern is the same as the pattern of CURRENCYSTYLE
+         * but by replacing the single currency sign with
+         * double currency sign or triple currency sign.
+         */
+        int styleInNumberPattern = ((style == kIsoCurrencyStyle ||
+                                     style == kPluralCurrencyStyle) ?
+                                    kCurrencyStyle : style);
+
+        resource = ures_getByKeyWithFallback(resource, gNumberElements, resource, &status);
+        // TODO : Get patterns on a per numbering system basis, for right now assumes "latn" for patterns
+        resource = ures_getByKeyWithFallback(resource, gLatn, resource, &status);
+        resource = ures_getByKeyWithFallback(resource, gPatterns, resource, &status);
+
+        const UChar *patResStr = ures_getStringByKeyWithFallback(resource, gFormatKeys[styleInNumberPattern], &patLen, &status);
+
+        // Creates the specified decimal format style of the desired locale.
+        pattern.setTo(TRUE, patResStr, patLen);
+    }
+    if (U_FAILURE(status) || symbolsToAdopt == NULL) {
+        goto cleanup;
+    }
+    if(style==kCurrencyStyle || style == kIsoCurrencyStyle){
+        const UChar* currPattern = symbolsToAdopt->getCurrencyPattern();
+        if(currPattern!=NULL){
+            pattern.setTo(currPattern, u_strlen(currPattern));
+        }
+    }
+
+    // Use numbering system cache hashtable
+    UMTX_CHECK(&nscacheMutex, (UBool)(cache != NumberingSystem_cache), getCache);
+    if (getCache) {
+        umtx_lock(&nscacheMutex);
+        cache = NumberingSystem_cache;
+        umtx_unlock(&nscacheMutex);
+    }
+
+    // Check cache we got, create if non-existant
+    status = U_ZERO_ERROR;
+    if (cache == NULL) {
+        cache = uhash_open(uhash_hashLong,
+                           uhash_compareLong,
+                           NULL,
+                           &status);
+
+        if (cache == NULL || U_FAILURE(status)) {
+            // cache not created - out of memory
+            cache = NULL;
+        }
+        else {
+            // cache created
+            uhash_setValueDeleter(cache, deleteNumberingSystem);
+
+            // set final NumberingSystem_cache value
+            UHashtable* h = NULL;
+
+            UMTX_CHECK(&nscacheMutex, (UBool)(h != NumberingSystem_cache), getCache);
+            if (getCache) {
+                umtx_lock(&nscacheMutex);
+                h = NumberingSystem_cache;
+                umtx_unlock(&nscacheMutex);
+            }
+            if (h == NULL) {
+                umtx_lock(&nscacheMutex);
+                NumberingSystem_cache = h = cache;
+                cache = NULL;
+                ucln_i18n_registerCleanup(UCLN_I18N_NUMFMT, numfmt_cleanup);
+                umtx_unlock(&nscacheMutex);
+            }
+
+            if(cache != NULL) {
+              uhash_close(cache);
+            }
+            cache = h;
+        }
+    }
+
+    // Get cached numbering system
+    if (cache != NULL) {
+        hashKey = desiredLocale.hashCode();
+
+        umtx_lock(&nscacheMutex);
+        ns = (NumberingSystem *)uhash_iget(cache, hashKey);
+        if (ns == NULL) {
+            ns = NumberingSystem::createInstance(desiredLocale,status);
+            uhash_iput(cache, hashKey, (void*)ns, &status);
+        }
+        umtx_unlock(&nscacheMutex);
+    }
+    else {
+        ns = NumberingSystem::createInstance(desiredLocale,status);
+        deleteNS = TRUE;
+    }
+
+    // check results of getting a numbering system
+    if ((ns == NULL) || (U_FAILURE(status))) {
+        goto cleanup;
+    }
+
+    if (ns->isAlgorithmic()) {
+        UnicodeString nsDesc;
+        UnicodeString nsRuleSetGroup;
+        UnicodeString nsRuleSetName;
+        Locale nsLoc;
+        URBNFRuleSetTag desiredRulesType = URBNF_NUMBERING_SYSTEM;
+
+        nsDesc.setTo(ns->getDescription());
+        int32_t firstSlash = nsDesc.indexOf(gSlash);
+        int32_t lastSlash = nsDesc.lastIndexOf(gSlash);
+        if ( lastSlash > firstSlash ) {
+            char nsLocID[ULOC_FULLNAME_CAPACITY];
+
+            nsDesc.extract(0,firstSlash,nsLocID,ULOC_FULLNAME_CAPACITY,US_INV);
+            nsRuleSetGroup.setTo(nsDesc,firstSlash+1,lastSlash-firstSlash-1);
+            nsRuleSetName.setTo(nsDesc,lastSlash+1);
+
+            nsLoc = Locale::createFromName(nsLocID);
+
+            UnicodeString SpelloutRules = UNICODE_STRING_SIMPLE("SpelloutRules");
+            if ( nsRuleSetGroup.compare(SpelloutRules) == 0 ) {
+                desiredRulesType = URBNF_SPELLOUT;
+            }
+        } else {
+            nsLoc = desiredLocale;
+            nsRuleSetName.setTo(nsDesc);
+        }
+
+        RuleBasedNumberFormat *r = new RuleBasedNumberFormat(desiredRulesType,nsLoc,status);
+
+        if (U_FAILURE(status) || r == NULL) {
+            goto cleanup;
+        }
+        r->setDefaultRuleSet(nsRuleSetName,status);
+        f = (NumberFormat *) r;
+
+    } else {
+        // replace single currency sign in the pattern with double currency sign
+        // if the style is kIsoCurrencyStyle
+        if (style == kIsoCurrencyStyle) {
+            pattern.findAndReplace(gSingleCurrencySign, gDoubleCurrencySign);
+        }
+
+        f = new DecimalFormat(pattern, symbolsToAdopt, style, status);
+        if (U_FAILURE(status) || f == NULL) {
+            goto cleanup;
+        }
+        deleteSymbols = FALSE;
+    }
+
+    f->setLocaleIDs(ures_getLocaleByType(resource, ULOC_VALID_LOCALE, &status),
+                    ures_getLocaleByType(resource, ULOC_ACTUAL_LOCALE, &status));
+
+cleanup:
+    ures_close(resource);
+
+    if (deleteNS && ns) {
+        delete ns;
+    }
+
+    if (U_FAILURE(status)) {
+        /* If f exists, then it will delete the symbols */
+        if (f==NULL) {
+            delete symbolsToAdopt;
+        }
+        else {
+            delete f;
+        }
+        return NULL;
+    }
+    if (f == NULL || symbolsToAdopt == NULL) {
+        status = U_MEMORY_ALLOCATION_ERROR;
+        f = NULL;
+    }
+    if (deleteSymbols && symbolsToAdopt != NULL) {
+        delete symbolsToAdopt;
+    }
+    return f;
+}
+
+U_NAMESPACE_END
+
+#endif /* #if !UCONFIG_NO_FORMATTING */
+
+//eof